HR: 08:20h
AN: OS51D-02    [Abstracts]
TI: Volatiles in Hydrothermal Systems: Then and Now
AU: * Lilley, M D
EM: lilley@ocean.washington.edu
AF: University of Washington, School of Oceanography, Box 355351, Seattle, WA 98195-5351 United States
AB: Jack Diamond was one of the principal investigators on the original proposal to dive on the Galapagos hydrothermal system. Jack participated on the cruise and, along with his graduate student (Richard Cobbler), made the first measurements of radon in hydrothermal systems. Louis I. Gordon and the author were also participants on this cruise and we made measurements of methane and hydrogen. In the ensuing 27 years much has been learned about volatiles in hydrothermal systems. For example, we have learned that phase separation and water/rock reactions play major roles in the volatile composition of hydrothermal fluids and that temporal variability is the rule rather than the exception. A summary of progress in this field will be given.
DE: 1050 Marine geochemistry (4835, 4850)
SC: Ocean Sciences [OS]
MN: 2004 AGU Fall Meeting